making greenhouse hoops from the top railings designed for chainlink

making greenhouse hoops from the top railings designed for chainlink fencing. they're an excellent fit, can be combined to make larger hoops and can be easily bent with a makeshift frame like this using some forms and boards for supports. Its doesn't really matter what you bend the poles around so long as it creates a gradual curve that ends up in the shape that you like, and then you can repeat it across all of your hoops so that it's uniform. Here about a dozen ribs were created with two and a half lengths of toprail each. Later after they were in place, some more pieces were added to create trusses and bracing to support for snow load.